21000223231331 has 2 divisors, whose sum is σ = 21000223231332. Its totient is φ = 21000223231330.

The previous prime is 21000223231313. The next prime is 21000223231349. The reversal of 21000223231331 is 13313232200012.

Together with previous prime (21000223231313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (21000223231313) and next prime (21000223231349).

It is a cyclic number.

It is not a de Polignac number, because 21000223231331 - 2¹⁰ = 21000223230307 is a prime.

It is a super-2 number, since 2×21000223231331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21000223231297 and 21000223231306.

It is not a weakly prime, because it can be changed into another prime (21000223231231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500111615665 + 10500111615666.

It is an arithmetic number, because the mean of its divisors is an integer number (10500111615666).

Almost surely, 2^{21000223231331} is an apocalyptic number.

21000223231331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000223231331 is an equidigital number, since it uses as much as digits as its factorization.

21000223231331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21000223231331 its reverse (13313232200012), we get a palindrome (34313455431343).

The spelling of 21000223231331 in words is "twenty-one trillion, two hundred twenty-three million, two hundred thirty-one thousand, three hundred thirty-one".